Hot, Sunny Days Forecast Through the Weekend. Late Morning through Afternoon Isolated Showers Possible.

Weather Forecast (Next 24 Hours)

As of 12:30PM Friday 9th August 2019,mostly sunny to partly cloudy skies are occurring across Trinidad and Tobago. Isolated showers are ongoing across the Western half of Trinidad, with a few, brisk isolated showers forecast to affect the remainder of T&T through the evening, interrupting sunny skies. A settled and mostly clear night is ahead.

Very hot temperatures are ongoing across Trinidad and Tobago, with a mild increase in Saharan Dust expected over the next 3 days.

Throughout the morning, mostly settled conditions occurred across Trinidad and Tobago with a few brisk isolated showers favoring the Western half of Trinidad. Partly cloudy skies are forecast to continue through the afternoon and evening, with the odd isolated shower due to low-level cloud patches traversing both islands.

Showers are forecast to subside by the late evening, giving way to mostly clear skies, barring the odd isolated shower. A mostly settled evening is forecast for Trinidad and Tobago.

Generally gentle to fresh breezes (15-40 KM/H) winds are forecast for Friday, through the weekend, mainly from the east.


Last night’s minimum temperatures were warm at 25°C at Piarco, Trinidad and 27°C at Crown Point, Tobago. Minimum low temperatures across Trinidad and Tobago tomorrow are forecast to range between 24°C-27°C, with temperatures at the upper end of the minimum low-temperature range favoring Tobago. Low temperatures are likely to be lower across inland and mountainous areas. Light winds and clear skies will allow for a cool night.

Today, maximum high temperatures across T&T are forecast to be near a hot 33°C at Piarco, Trinidad and a heat index of ranging from 40°C to 45°C . Across Tobago, maximum high temperatures are forecast to be a warm 32°C with a heat index of 34-37°C. The heat index is an index that combines air temperature and relative humidity, generating a “feel’s like” temperature.

The Heat Index

Several persons across the country took to social media to complain about the heat, or more so what outside felt like. This is called the heat index and is a combination of air temperature and relative humidity determining what the air feels like to a person i.e. how hot it actually feels.

The heat index is important because of sweating. Your body sweats in order to cool the skin and maintain a constant, healthy body temperature. This cooling process means that the sweat has to evaporate off the skin to remove heat. However, if the sweat is unable to evaporate, the body isn’t able to regulate temperature.

With high volumes of moisture in the air, also known as high relative humidity, which T&T regularly experience due to its tropical climate, the rate of sweat evaporation decreased. This is because the atmosphere is unable, or has limited potential to hold additional moisture in the atmosphere.

This results in you feeling warmer in humid conditions and cooler in less humid conditions i.e. when relative humidity decreases. As temperature increases, the heat index increases. As relative humidity increases, so does the heat index.

 Heat Index Values Explained
Heat Index Values Explained

The heat index is generally classified into four categories: caution, extreme caution, dangerous and extremely dangerous. Generally across Trinidad and Tobago, we experience heat indices of caution to extreme caution in times of hot days, with isolated areas experiencing dangerous heat indices such as urban areas.

Today, heat index levels are between extreme cautious to dangerous levels. Heat cramps and heat exhaustion are likely. Heatstroke may be probable with continued outdoor activity.

High Temperatures To Continue Through Sunday

A high-pressure system continues to affect the Lesser Antilles, producing mostly stable weather with sunny skies and generally breezy conditions.

This is forecast to continue through Sunday, as Tropical Wave 34 nears the Lesser Antilles.

On Saturday and Sunday, maximum high temperatures are forecast to be near 32-34°C across Trinidad, and 31-33°C across Tobago. Heat indices are also forecast to be high, near 35-45°C across Trinidad, and 34-37°C across Tobago.

Heat Safety

Graphic: Beat the Heat. Heat related deaths are preventable.

Graphic: Beat the Heat. Heat related deaths are preventable.

Source: MEMA
Heat Safety Tips and Resources
Heat Safety Graphic. Source: Heat Safety Tips and Resources

Is this a heatwave?


An article from the Pan American Health Organization (PAHO) earlier last month made the rounds on social media, urging Northern Hemisphere countries to prepare for heatwaves.

Today (and tomorrow) are just some hot days in the tropics, as heatwaves are generally prolonged heat with life-threateningly high temperatures.


Seas are forecast to remain slight to moderate in open waters throughout the weekend. Waves in open waters are forecast to remain between 1.0 to 1.5 meters particularly East of Trinidad and Tobago through Sunday. In sheltered areas, seas are forecast to remain near calm. Winds will be from the east through the next 2 days at 10-15 knots.

Mild Saharan Dust Lingering Through The Weekend. Improvement Expected on Sunday

Most islands across the Eastern Caribbean are experiencing good air quality levels, based on U.S. standards as of 12:00 PM Friday 9th August 2019. A mild to moderate surge of Saharan Dust is nearing the Eastern Caribbean, bringing hazy skies and slightly reduced air quality, mainly north of T&T, beginning today. Air quality may briefly dip to moderate levels, mainly on Friday and Saturday across T&T, returning to good levels by late Sunday.
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